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Periodic law — Periodic Pe ri*od ic, Periodical Pe ri*od ic*al, a. [L. periodicus, Gr. ?: cf. F. p[ e]riodique.] 1. Of or pertaining to a period or periods, or to division by periods. [1913 Webster] The periodicaltimes of all the satellites. Sir J. Herschel.… … The Collaborative International Dictionary of English

Periodic law — Law Law (l[add]), n. [OE. lawe, laghe, AS. lagu, from the root of E. lie: akin to OS. lag, Icel. l[ o]g, Sw. lag, Dan. lov; cf. L. lex, E. legal. A law is that which is laid, set, or fixed; like statute, fr. L. statuere to make to stand. See… … The Collaborative International Dictionary of English

periodic law — n a law in chemistry: the elements when arranged in the order of their atomic numbers show a periodic variation of atomic structure and of most of their properties called also Mendeleev s law * * * if the elements are arranged in the sequence of… … Medical dictionary

periodic law — n. the principle that the properties of the chemical elements recur periodically when the elements are arranged in increasing order of their atomic numbers … English World dictionary

periodic law — /pear ee od ik, pear /, Chem. 1. the law that the properties of the elements are periodic functions of their atomic numbers. 2. Also called Mendeleev s law. (originally) the statement that the chemical and physical properties of the elements… … Universalium

periodic law — pe′ri•od′ic law′ [[t]ˈpɪər iˈɒd ɪk, ˌpɪər [/t]] n. 1) chem. the law that the properties of the chemical elements are periodic functions of their atomic numbers 2) chem. (formerly) the statement that the chemical and physical properties of the… … From formal English to slang